'Castle' casts Lachlan Buchanan in 'Real Housewives' parody episode

Some of our favorite
"Castle" episodes poke fun at pop culture, so we're particularly looking forward to episode 514, "Reality Star Struck."
Nathan Fillionwill reunite with his "Firefly" costar
Gina Torres for the episode, which focuses on a "Real Housewives"-esque reality show called "The Wives of Wall Street."

And let's just say they're using the term "reality" loosely -- on this show, all is not as it seems.

Now,
Zap2it has learned exclusively that
Lachlan Buchanan will play Stone Gower. The 24-year-old son of
Gail O'Grady's character, a reality star and cosmetics mogul, Gower feels he was bullied into participating in the reality series. He and his fiancee, ceramics entrepreneur Ashley Robinson -- who is played by
Heather Ann Davis -- are in talks for a spin-off show of their own when one of his colleagues is murdered... and Stone is brought in as a suspect.

The episode also reunites Buchanan with
Patrick Fabian, who he worked with on the CMT sitcom "Working Class." Buchanan is also known for his work on "Hung" and "Pretty Little Liars." He stars in the upcoming film "Feed the Dog" with
Nat Wolff and Selena Gomez.